We release 1 older episode of Bleach each week. I think the reason for the delay is that VIZ is still in the process of subtitling the videos. They already have to subtitle Naruto Shippuden for us each week as well as One Piece for Funimation so they must have decided to subtitle 4 episodes per week (latest Naruto Shippuden, latest One Piece, latest Bleach, 1 older episode of Bleach) in order to pace themselves.

Is there any recent news about when the missing Season 12-13 episodes will be available?

We are working to get the missing episodes of Bleach available here as soon as we can. Unfortunately we can not be able to say when this will be accomplished since, due to the terms of our agreement, we are behind Cartoon Network's release schedule. As such, we currently only receive 1 old and 1 new episode of Bleach each week which is what we release on our site each week. Shortly after Cartoon Network broadcasts episode 265, we will be caught up.

Let me give you a more specific answer, we are 36 weeks behind CN/AS on Bleach, so 36 weeks after they air 265 we will have it on this site, so 51 weeks from today we will have every single episode of Bleach on the site. CN didn't air Bleach last week, but I doubt them airing it affects the subbing process.